45637919 has 4 divisors (see below), whose sum is σ = 45901896. Its totient is φ = 45373944.

The previous prime is 45637913. The next prime is 45637937. The reversal of 45637919 is 91973654.

45637919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45637919 - 2⁴ = 45637903 is a prime.

It is a super-2 number, since 2×45637919² = 4165639301301122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45637919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45637913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131729 + ... + 132074.

It is an arithmetic number, because the mean of its divisors is an integer number (11475474).

Almost surely, 2^45637919 is an apocalyptic number.

45637919 is a deficient number, since it is larger than the sum of its proper divisors (263977).

45637919 is a wasteful number, since it uses less digits than its factorization.

45637919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263976.

The product of its digits is 204120, while the sum is 44.

The square root of 45637919 is about 6755.5842826509. The cubic root of 45637919 is about 357.3621983448.

The spelling of 45637919 in words is "forty-five million, six hundred thirty-seven thousand, nine hundred nineteen".